<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>径向渐变 - 颜色结点不均匀分布</title>
<style type="text/css">
div {
	width: 800px; height: 500px;
	background: -webkit-radial-gradient(red 50%, blue 70%);
	background:    -moz-radial-gradient(red 50%, blue 70%);
	background:      -o-radial-gradient(red 50%, blue 70%);
	background:         radial-gradient(red 50%, blue 70%);
}
</style>
</head>
<body>
<div></div>
</body>
</html>